Ideal Weight Calculator - Devine, Robinson, Miller & Hamwi
Compare four clinically used ideal weight formulas based on your height and biological sex. See individual estimates, an average, and the full range across methods.
Your Height
Devine, Robinson, Miller, and Hamwi formulas.
Ideal Weight Estimates
Average Ideal Weight
72.3 lbs
Range: 70.3 lbs - 75 lbs
Methodology and limitations
Last reviewed:
Methodology
Computes ideal weight using Devine, Robinson, Miller, and Hamwi clinical formulas from height and sex, then reports the average and a practical range across formulas.
Limitations
Formula-based ideal weights do not account for frame size, muscle mass, ethnicity, or medical history. Use as a screening reference, not a clinical prescription.
Official sources
How Ideal Weight Is Calculated
Compare four clinically used ideal weight formulas based on your height and biological sex. See individual estimates, an average, and the full range across methods.
Method used
The calculator runs your height and sex through Devine, Robinson, Miller, and Hamwi clinical formulas, averages the results, and shows a practical low-to-high range across formulas.
Devine (male) = 50 kg + 2.3 kg × (height in inches − 60)
Practical example
A woman who is 5 ft 5 in might see ideal weights around 125-130 lb across formulas, with an average near 127 lb and a suggested range of roughly 120-135 lb.
- Sex and height in feet/inches or centimeters
The result lists each formula's weight in lb and kg, the average ideal weight, and a practical range.
Assumptions
- Formulas apply to adults with typical frame sizes.
- Results are screening references, not personalized medical targets.
- Height is entered without shoes for consistency.
What this includes
- Devine, Robinson, Miller, and Hamwi results, average ideal weight, and low-high range.
What this excludes
- Frame size adjustment, athlete muscle mass, pediatric growth charts, pregnancy weight guidance, and clinical obesity treatment plans.
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Frequently Asked Questions
Which ideal weight formula is most accurate?
No single formula is best for everyone. Devine is common in drug dosing contexts; Robinson and Miller are later refinements; Hamwi is another classic bedside estimate. Comparing all four gives a useful reference range rather than one rigid target. Treat the average and spread as educational context alongside BMI, waist size, and clinical advice—not a prescription weight.
Does frame size affect ideal weight?
These formulas do not adjust for bone structure, muscle mass, or athletic training. People with larger frames or high muscle may weigh above the calculated range and still be healthy by body composition and lab markers. If you are very muscular or have a notably large or small frame, interpret ideal weight as a rough band, not a pass/fail cutoff.
Are ideal weight formulas used by doctors?
Yes. Devine in particular is used for some medication dosing and clinical estimates when lean body weight approximations are needed. They remain reference tools, not strict lifestyle targets for every individual. Dosing and treatment decisions require a licensed clinician; this calculator only shows educational formula outputs for height and sex.
How does ideal weight relate to BMI?
Ideal weight formulas and BMI healthy ranges often overlap for average builds but use different math. BMI compares weight to height squared; these formulas apply linear adjustments from a base height. Someone can sit near an ideal-weight average yet fall slightly outside a BMI band, or the reverse. Use both as screens, not competing truths.
Can I use this if I am an athlete?
Athletes with significant muscle may exceed ideal weight estimates without excess fat or metabolic risk. Pair this calculator with body composition, performance goals, and how you recover in training for a fuller picture. Do not force weight down to a formula average if it harms strength, menstrual health, or energy—seek sport-informed clinical guidance when unsure.